1. An endothermic reaction _________ energy.
A. eliminates
B. generates
C. None of these
D. absorbs
2.The energy change in an endothermic reaction is:
A. External
B. Positive
C. Negative
D. Internal
3.What is the total energy change for the following reaction: H2 + I2 -> 2HI?
Given:
H-H bond: 436 kJ/mol
I-I bond: 151 kJ/mol
H-I bond: 297 kJ/mol
A. +297 kJ/mol
B. +7 kJ/mol
C. -7 kJ/mol
D. -290 kJ/mol
4.While camping you light a small campfire, initiating the combustion of wood to produce heat and light. What can you determine about this reaction?
A. It is endothermic.
B. The bond breaking energy is more than 600 kJ.
C. It is exothermic.
D. The bond making energy is more than 600 kJ.